【摘 要】
：
Photosynthetic rate (Pn) and the partitioning of noncyclic photosynthetic electron transport to photorespiration (Jo) in seedlings of four subtropical woody pla
【机 构】
：
South China Institute of Botany
论文部分内容阅读
Photosynthetic rate (Pn) and the partitioning of noncyclic photosynthetic electron transport to photorespiration (Jo) in seedlings of four subtropical woody plants growing at three light intensities were studied in the summer time by measurements of chlorophyll fluorescence and CO2 exchange. Except Schima superba, an upper canopy tree species, the tree species Castanopsis fissa and two understory shrubs Psychotria rubra, Ardisia quinquegona had the highest Pn at 36% of sunlight intensity. The total photosynthetic electron transport rate (JF) and the ratio of Jo/JF were elevated in leaves under full sunlight. Jo/JF ratio reached 0.5-0.6 and coincided with the increasing of oxygenation rate of Rubisco (Vo), the activity of glycolate oxidase and photorespiration rate at full sunlight. It is suggested that an increasing partitioning proportion of photosynthetic electron transport to photorespiration might be one of the protective regulation mechanisms in forest plant under strong summer light and high temperature conditions.
其他文献
随着食品安全问题在各地被媒体所曝光，农产品生产的标准化问题也被人们提上议事日程，那么如何强化农产品生产的标准化建设，确保食品安全呢？笔者通过广泛调研发现，创建农业标准化示
本文论述了铁路罐车容积检定的内、外测量检定后结果的对比，通过容积的换算对对比后所产生的误差进行了分析。
我国产橘量大，其中柑橘皮含有大量果胶。本文以柑橘皮为原料，研究果胶在不同方法、条件下的产量。并通过正交实验选择一个最佳工艺条件，即用研磨的预处理的方法，酸法提取，物料比5：1
由于地下商场构造的特殊性，一旦发生火灾后果不堪设想。本文对地下商场火灾的特点、人员逃生的心理等方面进行了粗浅的分析概括，并提出了几点意见应对有可能发生的地下商场火灾
在采暖供热系统中，采用热水作为载热液体的方法得到了广泛的应用。随着供热体制的改革，节能减排政策的深入，供热收费标准也逐渐采用以热量值来计算。这样就要安装热计量装置，装置
PM 2.5在室内颗粒物中占有很大比例，由于具有比表面积大的特点，对多种有机物具有较强的吸附能力，可以直接进入肺泡，导致年总死亡率、心肺疾病死亡率以及肺癌死亡率的增加，对人体产
Many studies have showed that apoptosis exists in plants. Our study shows that (1) menadione(VK3) induces apoptosis in suspension cultures of carrot cells; (2)
企业开展安全生产标准化建设，能进一步落实企业安全生产主体责任，改善企业安全生产条件，提高企业安全管理水平，预防事故，提升企业本质安全，对保障生命财产安全具有重要意义。评审单
The blood coagulation system is very important to life. This paper presents a mathematical blood coagulation model for the extrinsic pathway. This model simulat
Levels of phosphomonoester (PME), phosphodiester (PDE), ATP and pH in brain cells of chicken embryos rotated for 24 h in a clinostat during the period of hatchi